Doorlock



DooRLocK Filed Nov. l, 1935 2 Sheets-Sheet l April A30, 1935. H. G.volGHT 1,999,311

DOORLOCK Filed Nov. 1, 1933 2 Sheets-Sheet 2 Y IZ 0I3737 Patented Apr.30, 1935 UNITED STATES PATENT OFFICE DOORLOCK Application November 1,1933, Serial No. 696,240

6 Claims.

This invention relates to door locks and more particularly to locks ofthe so-called "unit type in which the entire lock mechanism is assembledbefore being placed upon the door and is thereafter inserted in a slotor cutout provided in the edge of the door in assembled condition.

One of the objections to such locks has been that they are relativelyexpensive and have, therefore, been used mainly in oflices and otherpublic buildings wherein relatively heavy and expensive hardware isemployed. v

One object of the present invention is the provision of a lock of thischaracter which will be provided with all the advantageous features ofmore expensive locks and will at-the same time be susceptible of beingmanufactured at a relatively low cost.

A further object of the invention is the provision of a lock of thischaracter of simple and compact form which may be manufactured at acomparatively low cost and be of relatively light weight and moderatesize.

A still further object of the invention is the provision of a lock ofthis character so constructed that it will possess certain manufacturingadvantages that enable it to be made at a relatively low cost.

A still further object of the invention is the provision of a new andimproved dogging mechanism for the lock bolt, which is mounted in one ofthe lock knobs.

To these and other ends, the invention consists in the novel featuresand combinations of parts to be hereinafter described and claimed.

In the drawings:

Fig. 1 is a front elevational view of the inside of a door having myimprovedv lock applied thereto;

Fig. 2 is an edge view of the door and lock;

Fig. 3 is a view of the lock with the case cover removed to show theinterior mechanism;

Fig. 4 is a rear view of the lock with a part of the case removed;

Fig. 5 is a transverse sectional view on line 5-5 of Fig. l;

Fig. 6 is a longitudinal sectional view on line 6-6 of Fig. 2; and

Fig, 'l is an enlarged sectional view of the knob Shanks and associatedmechanism taken on line 1-1 of Fig. 6.

To illustrate a preferred embodiment of my invention, I have shown alock designated generally by the numeral ID mounted upon a door II. Itwill be understood that this lock is of the so-called unit lock type andis, as shown in Figs. 5 and 6,

mounted or inserted in a slot or recess I2 cut through the edge of thedoor, the edges of the opening being concealed by inner and outerescutcheonuplates I3 and |4 which are of larger dimension than the lockcase which is received snugly in the slot |2.

The lock case proper comprises a base plate I5 having a front or faceplate I6 formed integrally therewith. This front plate I6 is, as shown,of greater width than the depth of the lock case, so that the lock maybe used with doors of varying thicknesses.' A cover plate I1 is securedto the base plate by means of screws I8 inserted into hollow threadedposts I9 secured to the plate I5. One side of the case between theplates |5 and I1 is closed by the front plate I6, and the other threesides are closed by a U-shaped cover plate 20 which is preferably madeof thin resilient material to snap into place about the lock and protectthe interior parts. 'I'his U-shaped part may be freely removed when thelock is dismounted from the door. Adjacent the face plate, side members2| and 22 are secured to the part I5 and are provided with upstandinglugs 23 and 24 which are received in notches inthe cover plate I.1 toassist in positioning the latter.

The escutcheon plate I4 is secured to the plate I5 by screws 25 enteringthe threaded bosses 26 secured to the escutcheon plate I4, while theescutcheon plate I3 is secured to the case by means of screws 21entering the threaded posts 28 secured to the plate I4. It will beunderstood vthat the screws 21 as well as the threaded posts 28 are ofsufficient length to provide for considerable adjustment of theescutcheon plate I3 relatively to the plate I5 so that the lock may beaccommodated to doors of various thicknesses. These screws pass throughnotches or openings (not shown) in the cover plate I1.

As shown more'particularly in Figs. 3 and 6, the lock is provided with areciprocable latch bolt 3|) having a stem 3|, surrounding which is aspring 32 acting between the head of the latch bolt and an upstandingmember 33 secured to the plate I5, in which the stem 3| is sldablymounted. It will be obvious that the spring 32 tends to urge the latchbolt 30 to protracted position. The extreme rear yend of the stem 3| isalso sldably mounted in a depending portion 34 of a yoke 35, a washer 36on the rear end of the stem engaging the member 34 to limit the movementof the stem through the yoke member in one direction. It will beapparent that when the yoke is moved rearwardly in the lock, the boltwill be retracted.

The yoke is provided with spaced arms 31 and 38, upon the ends of whichare depending lugs 39 and 46 which terminate in tongues 4I and 42slidably received in openings 43 and 44 in the plate I5. Upon the arms31 and 38 are provided upstanding guides 45 and 46 which engage theplate I1. It will be seen, therefore, that the yoke will be properlyguided in its reciprocating movements by these upstanding guides whichengage the cover plate I1, and by the lower ends of the depending lugs39 and 46 which engage and slide upon the opposite plate I5. Alsomounted upon the yoke is a post 41 against which acts one end of aspring 48 coiled about a post 49 secured to the plate I5, the other endof which bears against a post 56 secured to the same plate. The guidepost 41 also engages the plate I1, as shown more especially in Fig. `6,and assists in maintaining the yoke in its proper position in the lock.It may also be observed that while the spring 32 alone serves to movethe bolt to protracted position, both this spring and the spring 46assist in moving the yoke forward or in the position in which the boltis protracted after the retraction of the bolt and yoke by therollbacks, as will be hereinafter described.

Formed integrally with the plates I5 and I1 are bearing sleeves 5I and52 serving as elongated cylindrical bearings for the knob Shanks 53 and54, upon which are secured the knobs 55 and 56, 56 in this instancebeing the knob mounted upon the inner side of the door. These bearingsleeves may be conveniently made integrally with the plates I5 and I1 bya die-casting operation,

'I'he knob Shanks 53 and 54 are provided with annular grooves 51 and 58,into which project the ends of L-shaped clips 59 and 60 secured byscrews 6I, or the like, to lugs 62 formed on the plates I5 and I1. Theends of these clips project through slots formed in the bearing sleeves5I and 52 for this purpose. The engagement of these clips with the knobshanks holds the knob against longitudinal movement within the sleeveswhile permitting free rotary movement of the knob Shanks, and thesleeves provide elongated bearing surfaces for the knobs, thus providingfor their proper operation and eliminating any tendency they might haveto bind when turned.

Within the knob 56 is mounted a lock 65, which may be an ordinary pintumbler lock having a key barrel 66. Secured to the end of the keybarrel is a hollow sleeve-like member 61 provided with a non-circularopening 68 in which is nonrotatably but slidably mounted a similarlyshaped spindle 69. Upon the inner end of this `spindle is a rollback 16having an extended hub 1I I'his hub is reduced at its end portions andupon these reduced portions are rotatably mounted additional rollbacks12 and 13. It will be observed that the rollback 16 will be turned byrotation of the spindle 69, which may be rotated by the rotation of thekey barrel 66 independently of the knob 55, or which will be rotatedwith this knob when the key barrel is locked thereto.

'I'he inner ends of the knob shanks 53 and 54 are slotted atdiametrically opposed points, as shown at 15 and 16 to engage therollbacks 12 and 13, respectively, so that these rollbacks will beoperated when the respective knob is turned. Also, the ends of the knobshanks are slightly counterbored to receive the hubs of the adjacentrollbacks, so that the rollback assembly, consisting of the rollbacks16, 12 and 13, is supported by, or may be said to be suspended between,the inner ends of the knob shanks. This support permits the rollbackassembly to be moved to a slight extent longitudinally of the knobShanks, or to the right or left, as shown in Fig. 7, for a purpose to'bedescribed hereinafter.

In locks of this character it is advantageous to provide for the doggingof the outside knob, or the dogging of the mechanism operated by theoutside knob, so that the door mayv not be opened from the outsideexcept by means of a key. This dog has usually been mounted in the frontedge of the lock, or the front plate, which is plate I6 of the presentstructure. In order,

however, to reduce the size of the lock, I have provided the doggingmechanism in the inside knob, as will now be described.

Rotatably mounted in the knob shank 54 and knob 56 is a stem 11 whichprojects through the knob 56 and is provided upon its projecting endwith a finger piece 11 by which it may be operated. A pin 18 is insertedthrough an opening in this rod, which pin lies in a transverse slot 19in the knob shank 54, so that while the stem 11 is permitted a limitedrotative movement, it is prevented from moving longitudinally within theknob shank. Upon the end of the stem 11 is a V-shaped cam member 66which cooperates with a correspondingly shaped slot 8| in the end-of aplunger 62, also mounted in the bore of the knob shank 54. A pin 63 ispassed through this plunger and through a longitudinal slot 84 in theknob shank so that the plunger is prevented from rotating but ispermitted a limited longitudinal movement. This plunger extends inwardlyinto the counterbore in the end of the shank 54 and abuts the hub 1I ofthe rollback 16. It will be seen, therefore, that when the stem 11 isrotated the cam 66 will ride out of the slot in the plunger 62 and causethis plunger to move to the right, as shown in Figs. 6 and 7. This willeffect a movement of the rollback assembly to the right, as shown inthese figures, and cause the rollback 12 to move into a slot 86 formedin an inwardly extending sleeve 81 upon the plate I5. This sleeve may beconsidered a continuation of the sleeve 5I. When the rollback 12 isengaged in this slot it will be held against movement, and as thisrollback is the one operated by the outside knob and is engaged with theknob shank, both it and the knob shank will be prevented from turning.It will be understood, however, that at this time the keymay be used torotate the key barrel and the spindle 69, which will effect rotation ofthe rollback 16 independently of the outside knob and rollback 12. Theoutside knob will, therefore, be effectively dogged, while at the sametime the lock may be operated by the proper key.

When the stem 11 is returned to its original position the cam member 86will be aligned with the groove 8|. It is necessary, however, to providesome means to move the rollback assembly and the plunger 62 to the left,as shown in Fig. 7, in order to free the outside knob. For this purposeI provide within the knob shank 53 a spring 88 which acts against theextension 61 of the key barrel at one end, and at the other end actsagainst a washer 89 which abuts one end of the hub 1I of the rollbackassembly and also the hub of the rollback 12. Therefore, whenever therollback assembly is not positively held in its right-hand position, asshown in Fig. 6, by the cam member 66, it will be urged to the left bythis spring. This will also move the plunger 82 to the left so that thecam member 80 will rest within the groove 8| in the plunger.

It will be understood that the rollbacks 10, 12 and 13 are each providedwith double arms, that is, arms extending in each direction from therespectivo hubs, and that these arms will engage the depending lugs 39and 40 on the ends of the arms 31 and 38 of the yoke 35, so that theyoke will be moved rearwardly or in a direction to retract the latchbolt whenever any one of these rollbacks is operated and regardless ofthe direction in which it is operated. It Will also be understood thatwhen the rollback assembly is moved to the right, the rollback 13 isstill engaged in the notches in the ends of the knob shank 54 so thatthis rollback will always be operable by the inside knob. Likewise, whenthe rollback assembly is moved toward the left by the spring 88, therollback 12, while it will be moved out of the notches 86 on the sleevemember secured'to the case, will still lie within the notches in the endof the shank 53 so that it will be operable by the outside knob.

It is also desirable in locks of this character to provide a latch dogoperable by a plunger in the face plate of the door to dog the latchbolt against being `forced back or jimmied by a tool inserted betweenthe face plate of the lock and the strike plate secured to the door jam.For

this purpose I have provided a dogging lever 90 pivotally mounted on apost 9| secured to the plate |5. A spring 92 surrounding this post actsupon a lug 93 on this lever to normally urge the end of the clogginglever upwardly, as shown in Fig. 3, to a'position behind the latch bolt30. A clogging plunger 94 projects through the face plate of the lockand is carried by a stem 95 which is slidably mounted in an upstandingplate 96 secured to the plate I5. A spring 91 acts against this plateand against the plunger 94 to maintain the latter in protractedposition. The stem 95 projects through the plate 96 and carries upon itsrear end a lug 98 having a finger 99 engaging the part 93 of theclogging lever 90 to move the latter to a position free of the latchbolt 30. It will be understood that when the door is in open positionthe spring 91 will protract the plunger 94 and cause the finger 99 tomove the dogging lever 90 against the tension of its spring 92 to aposition in which it clears the latch bolt 30 and permits freeretraction of the latter. When the door is closed, however, the plunger94 is retracted by contact with the door strike, thus removing the nger99 from engagement with the part 93, at which time the spring 92 willcause the dogging lever to move upwardly behind the bolt 30.

Upon the yoke 35 is a post |00 engaging in a recess in the tail |02 ofthe clogging lever 90. When the yoke 35 is moved rearwardly. as it willbe by any one of the rollbacks, this post |00 acting upon the edge ofthe recess or notch |0| will move the dogging lever 90 downwardlyagainst the tension of the spring so as to free the latch bolt andpermit retraction thereof by any of the rollbacks. It is believed thatthe operation of the lock will be suiciently understood from theforegoing description without further explanation of its operation.

While I have shown and described a preferred embodiment of my invention.it will be understood that it is not to be limited to all of the detailsshown, but is capable of modification and variation Within the spirit ofthe invention and within the scope of the appended claims.

What I claim is:

l. A door lock having a case and a latch bolt movably mounted therein, apair of knobs, one upon each side of the door to operate the latch bolt,said knobs having shanks thereon projecting into the case and havingtheir inner ends in spaced relation, a rollback assembly mounted betweensaid shank ends comprising a central rollback having laterallyprojecting hub members, an additional rollback rotatably mounted on eachof said hub members, the adjacent ends of said knob shanks beingcounterbored, said hub members having bearings therein whereby therollback assembly is suspended between the knob shanks, said rollbackassembly being mounted for movement longitudinally of said knob shanks,and means abutting one of said rollbacks for moving said rollbackassembly.

2. A door lock comprising a casing, a knob lshank rotatably mounted ateach side of the casing, said shanks projecting into the casing andhaving their inner ends in spaced relation, a rollback assembly mountedbetween the shank ends and comprising a central rollback and an endrollback on each side of the central rollback, a lock-operated spindlein one of said shanks extending into, and slidably connected with, saidcentral rollback to operate the same, and a plunger mounted in the othershank for longitudinal movement and abutting the adjacent rollback tomove said rollback assembly when said plunger is moved.

3. A door lock comprising a casing, a knob shank rotatably mounted ateach side of thc casing, said Shanks projecting into the casing andhaving their inner ends in spaced relation, a rollback assembly mountedbetween the shank ends and comprising a central rollback and an endrollback on each side of the central rollback, a lock-operated spindlein one of said Shanks extending into said central rollback to operatethe same, a plunger mounted in the other shank for longitudinal movementand abutting the adjacent rollback to move said rollback assembly whensaid plunger is moved, and a stem rotatably mounted in said last-namedshank to move said plunger longitudinally when the same is rotated.

4. A door lock comprising a casing, a knob shank rotatably mounted ateach side of the casing, said Shanks projecting into the casing andhaving their inner ends in spaced relation, a rollback assembly mountedbetween the shank ends and comprising a central rollback and an endrollback on each side of the central rollback, a lockoperated spindle inone of said shanks extending into said central rollback to operate thesame, a plunger mounted in the other shank for longitudinal movement andabutting the adjacent rollback to move said rollback assembly when saidplunger is moved, and means projecting from said knob shank to move saidplunger.

5. A door lock comprising a casing, a knob shank rotatably mounted ateach side of the casing and having their inner ends extending into thecasing and disposed in spaced relation, a knob on each shank, a rollbackmechanism mounted between the inner ends of said Shanks, said mechanismcomprising a central rollback having laterally projecting hubs extendinginto the shank ends, an end rollback rotatably mounted on each of saidhubs, a lock-operated spindle in one of said Shanks, said spindle beingslidably and non-rotatably engaged with said central rollback, and aplunger mounted in the other shank ing into the shank ends, an endrollback rotatably mounted on each of said hubs, a lock-operated spindlein one of said Shanks, said spindle being slidably and non-rotatablyengaged with said central rollback, said end rollbacks being engagedwith the knob Shanks to be operated thereby, and means in the other-knobshank to move said rollback mechanism longitudinally ot the shanks.

HENRY G. voIeH'r.

